From: Surbhi Palande Subject: [PATCH] ext4: Ensure writecache to disk in no journal mode Date: Fri, 26 Mar 2010 18:21:02 +0200 Message-ID: <1269620462-25906-1-git-send-email-surbhi.palande@canonical.com> Cc: Theodore Tso To: linux-ext4@vger.kernel.org Return-path: Received: from adelie.canonical.com ([91.189.90.139]:47471 "EHLO adelie.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751473Ab0CZQVN (ORCPT ); Fri, 26 Mar 2010 12:21:13 -0400 Sender: linux-ext4-owner@vger.kernel.org List-ID: Ensure that in the no journal mode the write cache is flushed to the disk by calling a blkdev_issue_flush() which issues a WRITE_BARRIER if necessary. Signed-off-by: Surbhi Palande --- fs/ext4/fsync.c | 8 ++++++-- 1 files changed, 6 insertions(+), 2 deletions(-) diff --git a/fs/ext4/fsync.c b/fs/ext4/fsync.c index d6049e4..1d73a50 100644 --- a/fs/ext4/fsync.c +++ b/fs/ext4/fsync.c @@ -67,8 +67,12 @@ int ext4_sync_file(struct file *file, struct dentry *dentry, int datasync) if (ret < 0) return ret; - if (!journal) - return simple_fsync(file, dentry, datasync); + if (!journal) { + ret = simple_fsync(file, dentry, datasync); + if (test_opt(inode->i_sb, BARRIER)) + blkdev_issue_flush(inode->i_sb->s_bdev, NULL); + return ret; + } /* * data=writeback,ordered: -- 1.6.3.3